Patent US4767507A successfully refreshed from Google Patents.
US4767507A
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Gold electroplating bath
Assignee: BASF Catalysts LLC
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Filing: 1988-01-11
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Granted: 1988-08-30
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Expires: 2008-01-11
Abstract
Abstract An acid gold electroplating bath contains gold in an electrodepositable form, (e.g. potassium gold cyanide), together with 3-(3-pyridyl) acrylic acid or 3-(3-quinolyl) acrylic acid, and optionally a metallic additive. The metallic additive is preferably a cobalt, nickel or iron salt.
Inventors
- 👤 Peter Wilkinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:50
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/48
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
26 words
An acid gold electroplating bath comprising gold in electrodepositable form and one or more additives selected from 3-(3-pyridyl) acrylic acid, 3-(3-quinolyl) acrylic acid, and salts thereof.
Claim 2
Dependent Claim
26 words
An acid gold electroplating bath comprising gold in electrodepositable form and one or more additives selected from 3-(3-pyridyl) acrylic acid, 3-(3-quinolyl) acrylic acid, and salts thereof.
Claim 3
Dependent Claim
15 words
An acid gold electroplating bath according to claim 1, which also contains a metallic additive.
Claim 4
Dependent Claim
20 words
An acid gold electroplating bath according to claim 1, wherein the metallic additive is a cobalt, nickel or iron salt.
Claim 5
Dependent Claim
25 words
An acid gold electroplating bath according to claim 1, wherein 3-(3-pyridyl) acrylic acid is present at a concentration of from 0.01 g/l to 5 g/l.
Claim 6
Dependent Claim
25 words
An acid gold electroplating bath according to claim 1, wherein 3-(3-pyridyl) acrylic acid is present at a concentration of from 0.5 g/l to 1.0 g/l.
Claim 7
Dependent Claim
28 words
An acid gold electroplating bath according to claim 1, wherein the gold is present as a water soluble complex at a concentration of from 1 to 20 g/l.
Claim 8
Dependent Claim
23 words
A process for forming a gold deposit on a metallic article, comprising electroplating said article in a bath as claimed in claim 1.
References Cited (Backward Citations)
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Cited
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Cited
US3901773A
Cited
US3929595A
Cited
US4038161A
Cited
EP0150439A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-08-30 | 1992-02-29 | 1992-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-30 | 1996-02-29 | 1996-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-30 | 2000-02-29 | 2000-08-30 | $7700.00 | Window Closed / Lapsed |